INFINITI FX45 Dome Light Bulb Size

The INFINITI FX45 dome light requires a DE3175 bulb size for proper installation within the interior overhead housing. Data for the specified component covers the period from 2003 through 2008.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2003-2008	DE3175

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

Other Locations

Additional Notes

The INFINITI FX45 uses the DE3175 bulb size for the dome light across all listed model years, spanning 2003-2008.
The DE3175 is classified as a festoon bulb, a type characterized by a cylindrical shape with metal end-cap contacts at each end rather than a screw or bayonet base.
The 31mm figure in the DE3175 designation refers to the length of the bulb, which is the critical fitment factor for festoon-type bulbs when seating into spring-clip dome light housings.
The DE3175 operates at 12 volts, consistent with standard automotive electrical systems.
The DE3175 designation follows the ANSI standard used in the United States and Canada, meaning the specification applies to North American market vehicles.
Because festoon bulbs rely on end-cap contact rather than a keyed base, physical length is the primary interchangeability factor; a bulb of differing length may not make reliable contact within the housing.